Synopsis

Description

The bkgdsets() and wbkgdset() routines manipulate the background of the named window.
Background is a chtype consisting of any combination of attributes and a
character. The attribute part of the background is combined (ORed) with all
non-blank characters that are written into the window with waddch(). Both the
character and attribute parts of the background are combined with the blank
characters. The background becomes a property of the character and moves with
the character through any scrolling and insert/delete line/character operations. To the extent possible
on a particular terminal, the attribute part of the background is displayed
as the graphic rendition of the character put on the screen.

The bkgd() and wbkgd() routines combine the new background with every position
in the window. Background is any combination of attributes and a character.
Only the attribute part is used to set the background of non-blank
characters, while both character and attributes are used for blank positions. To
the extent possible on a particular terminal, the attribute part of the
background is displayed as the graphic rendition of the character put on
the screen.

Return Values

bkgd() and wbkgd() return the integer OK, or a non-negative integer, if
immedok() is set. See curs_outopts(3CURSES).